Function assert_float_eq_fn 

pub fn assert_float_eq_fn<T: Float>(a: T, b: T)

Asserts the equality of two floats within the float types epsilon.

assert_ne!(0.2f64 * 3.0, 0.6);
assert_float_eq(0.2f64 * 3.0, 0.6);
assert_ne!(0.3f32 * 3.0, 0.9);
assert_float_eq(0.3f32 * 3.0, 0.9);